Theres two problems i have with that idea though:
1. It doesen't protect them from anyone else with access to the forums (any other users), so if someone wanted to find them out, they could register, be online within 10 minutes and find them out anyway.
2. This blocks valuable knowledge from the rest of the forum essentially.
I think if they are really concerned, they can post anonymously, or not use the forum for the personalized assistance they may require
![Smile :)](./images/smilies/icon_smile.gif)